Preparing for the IIT JAM Chemistry exam can be a challenging task, but with the right study resources, one can significantly improve their chances of qualifying. Here are some recommended study resources by previous qualifiers of IIT JAM Chemistry:

1. NCERT Books:
- NCERT textbooks are considered the foundation for IIT JAM Chemistry preparation.
- They provide a clear and comprehensive understanding of the fundamental concepts.
- Previous qualifiers highly recommend studying NCERT books thoroughly before moving on to advanced reference books.

2. Reference Books:
- "Organic Chemistry" by Morrison and Boyd is highly recommended for organic chemistry.
- "Physical Chemistry" by P.W. Atkins is a popular choice for physical chemistry.
- "Inorganic Chemistry" by J.D. Lee is a recommended book for inorganic chemistry.
- "Modern Approach to Chemical Calculations" by R.C. Mukherjee is recommended for numerical problem-solving.

3. Previous Years' Question Papers:
- Solving previous years' question papers is crucial for understanding the exam pattern and types of questions asked.
- It helps in identifying important topics, improving time management skills, and building confidence.
- Previous qualifiers suggest solving at least 5-10 years' question papers to get a good grasp of the exam.

4. Online Study Platforms:
- EduRev (www.edurev.in) is a reliable online study platform recommended by previous qualifiers.
- It provides access to a wide range of study materials, including notes, practice questions, mock tests, and video lectures.
- The platform offers a community of students and educators, allowing for discussions and doubt-solving.

5. Coaching Institute Study Material:
- Some previous qualifiers found study materials provided by coaching institutes helpful.
- However, it is important to note that self-study and understanding concepts thoroughly are equally important.
- Coaching institute study materials should be used as a supplement to your preparation.

6. Online Video Lectures:
- Online video lectures can be an effective way to grasp complex concepts and revise topics.
- Platforms like EduRev offer video lectures by experienced educators, making it easier to understand and retain information.

In conclusion, the key study resources recommended by previous qualifiers of IIT JAM Chemistry include NCERT books, reference books, previous years' question papers, online study platforms like EduRev, coaching institute study material, and online video lectures. It is important to have a well-rounded approach to preparation, focusing on understanding concepts, practicing problem-solving, and revising consistently.